The computer model can be used to determine, for a set of trains and operating assumptions, the motive power fleet (by unit type) that satisfies train service requirements at minimum ownership and operating cost. Power is assigned to trains and distributed throughout a time-space network of train service in an optimal manner. Reports and statistics give the resultant fleet size by unit type, utilization measures, average miles/unit/time period, total costs, etc. The model has been used to evaluate the economics of buying large numbers of 3000 h.p. 4-axle diesels. The model analyzed the relative costs of different ways of integrating such diesels into the total fleet. The assignment- distribution problem is formulated as a mixed-integer programming problem. IBM's MPSX linear programming package inbedded within the framework of an integer search algorithm is used to produce solutions to the problem.

  • Supplemental Notes:
    • Direct requests to Manager, Operational Research Canadian National.
  • Corporate Authors:

    Canadian National Railways

    935 la Gauchetiere Street, West
    Montreal, Quebec H3C 3N4,   Canada 
  • Publication Date: 1973-1

Subject/Index Terms

Filing Info

  • Accession Number: 00131921
  • Record Type: Publication
  • Source Agency: Canadian National Railways
  • Files: TRIS
  • Created Date: Jun 5 1976 12:00AM